<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>PHP 浮点数</title>
</head>
<body>
<?php 
$x = 10.365;
var_dump($x);
echo "<br>"; 
$x = 2.4e3;
var_dump($x);
echo "<br>"; 
$x = 8E-5;
var_dump($x);
?>
</body>
</html>